package io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

/**
 *文件复制,单字节读写
 */
public class CopyDemo {
    public static void main(String[] args) throws IOException {
        /*FileInputStream fis = new FileInputStream("./picture.jpg");
        FileOutputStream fos = new FileOutputStream("./picture_cy.jpg");
        long startTime = System.currentTimeMillis();

        int d;
        while ((d = fis.read())!=-1){
            fos.write(d);
        }
        long endTime = System.currentTimeMillis();
        fis.close();
        fos.close();
        System.out.println("复制完毕，耗时"+(endTime-startTime)+"ms");*/
        FileInputStream fis = new FileInputStream("./picture.jpg");
        FileOutputStream fos =new FileOutputStream("./picture_cy.jpg");
        long starTime = System.currentTimeMillis();
        int flag;
        while((flag=fis.read())!=-1){
            fos.write(flag);
        }

        long endTime = System.currentTimeMillis();
        System.out.println("复制完毕，耗时"+(endTime-starTime)+"ms");
        fis.close();
        fos.close();
    }
}
